think this case presents one issues in difficult american foreign policy. when do we get involved in an atrocity going on within someone else's country. that's a very tough question. would we have intervened in germany in 1938 if we knew what was going on. i think we all like to say we we d have and if we could, would have stopped it. it presupposes and the implication is we have a right do that anywhere in the world if there's an atrocity going on. that a u reflect on little bit? >> thank you, senator. defined one t significant kpant issue -- of militaryal basis intervention in the country. certainly every nation has a themselves in t their own history of self-defense. but to answer your question, you of the dimensions of his that you laid out, as did amplify on psey who cuts back ations and on the quell, when do we do this. what basis? we canthere a frame work follow? y answer is you start with the realities. these are both imperfect different situations. out, i dempsey laid think, rather clearly some of he dimensions of each of the countries in that regi